The present study was undertaken on 1070 children (571 boys and 499 girls) of secondary and senior secondary schools of Hisar district of Haryana state. The study was conducted with all children enrolled in classes 6th to 10th from six selected schools (three schools from urban area and three schools from rural area . Ladwa). This exploratory and crosssectional study aimed to identify the extent of bullying, victimization and fighting behaviour in a group of children and analyze the data regarding the gender of those involved in bullying, victimization and fighting behaviour. Illinois Bully Scale for children developed and standardized by Espelage and Holt (2001) was used to assess the bullying, victimization and fighting behaviour among school children. Children were personally interviewed about their bullying, victimization and fighting behaviour. Chi- square test was used to determine if there were statistically significant association between boys and girls. The results of the study highlighted that there was significant association between bullying, victimization, fighting behaviour and sex of children. Majority of the children both boys and girls were engaged in mild level of bullying, victimization and fighting behaviour. Percentages of boys were greater in moderate and severe bullying, victimization and fighting behaviour as compared to girls. | Bullying, victimization and fighting in secondary school: Gender-based differences